2 Kings 2:9-10

And when they had gone over, Elijah said to Elisha, Ask what I shall do for you before I am taken from you. And Elisha said, I pray you, let a double portion of your spirit be upon me. He said, You have asked a hard thing. However, if you see me when I am taken from you, it shall be so for you–but if not, it shall not be so.